Production of styrene
US10138180B2 · kind B2 · utility
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3References
8Claims
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Key dates
| Filing date | Nov 27, 2012 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Nov 27, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a process for producing styrene, benzene is alkylated with ethylene to produce ethylbenzene and at least some of the ethylbenzene is dehydrogenated to produce styrene, together with benzene and toluene as by-products. At least part of the benzene by-product is passed through a bed of an adsorbent comprising at least one of an acidic clay, alumina, an acidic ion exchange resin and an acidic molecular sieve to remove basic nitrogenous impurities therefrom and produce a purified benzene by-product, which is then recycled to the alkylation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.